This study aims to assess the impact of IL28B rs8099917 polymorphism on CHC genotype 4 (G4) susceptibility and liver fibrosis progression individually; and in combination with PNPLA3 rs738409.<b>Patients and methods:</b> IL28B rs8099917 and PNPLA3 rs738409 were genotyped in 150 Egyptian CHC patients and 175 healthy controls using real-time PCR.<b>Results:</b> IL28B rs8099917 genotype distribution significantly differs in healthy individuals versus CHC patients (<i>p</i> = .018); and in low versus advanced fibrosis IL28B (<i>p</i> = .013).
In individuals with diabetes and NAFLD, PNPLA3 gene rs738409 C > G polymorphism is a marker for the risk of significant liver fibrosis and cardiovascular disease and may be associated with better glycemic control.
In multivariate models adjusting for histologic features of nonalcoholic steatohepatitis and liver fibrosis, PNPLA3 I148M is associated with a decrease in VLDL particle size.
The rs738409 C>G p.I148M variant in the patatin-like phospholipase domain containing 3 (PNPLA3)-gene promotes triglyceride accumulation in hepatocytes and hepatic stellate cell activation and has previously been linked to hepatic steatosis/liver fibrosis.
Our study showed that PNPLA3 rs738409 and RNF7 rs16851720 confer an increased risk of developing liver fibrosis and cirrhosis in this Eastern European population, while the MERTK and PCSK7 SNPs are not associated with these conditions.
This study assessed the contribution of the PNPLA3 rs738409 polymorphism with regard to the steatosis and degree of liver fibrosis in Brazilian patients diagnosed with chronic hepatitis C.
PNPLA3 rs738409 polymorphism was associated with the severity of liver fibrosis in patients coinfected with HIV and hepatitis C virus, suggesting that this polymorphism might also play a significant role in the progression of hepatic fibrosis in this group of patients.
PNPLA3 rs738409 G allele carriers were found to be more susceptible to the metabolic-related hepatic steatosis, and developed NAFLD and liver fibrosis despite presenting relatively better metabolic statuses and lower risks for carotid atherosclerosis.
PNPLA3 rs738409 (C>G) was associated with the risk of both advanced liver fibrosis and steatosis in patients with CHC, especially among Caucasian populations.
Finally, we briefly highlight future research that may elucidate the specific mechanisms of the PNPLA3 I148M variant in fibrogenesis, which, in turn, provides a theoretical foundation and valuable experimental data for the clinical management of nonalcoholic fatty liver fibrosis.
A genetic variant in adiponutrin (PNPLA3) gene, rs738409 C/G, is associated with steatosis, severity, and progression of liver fibrosis in CHC patients, and predicts treatment outcome in difficult-to-cure HCV-infected patients with advanced fibrosis.
Furthermore, using two histologically characterized cohorts encompassing steatosis, steatohepatitis, fibrosis and cirrhosis (combined n=1,074), we demonstrate a new association, independent of potential confounding factors (age, BMI, type 2 diabetes mellitus and PNPLA3 rs738409 genotype), with advanced hepatic fibrosis/cirrhosis.
In particular, the common I148M variant of the PNPLA3 gene influencing hepatic lipid metabolism influences HCC risk independently of its effect on the progression of liver fibrosis.
This study confirms that in patients with type 2 diabetes who were not selected for liver abnormalities, liver fibrosis was related to the rs738409 polymorphism independent of BMI or LFC.
Homozygosity for the patatin-like phospholipase-3/adiponutrin I148M polymorphism influences liver fibrosis in patients with nonalcoholic fatty liver disease.
Recently, the rs738409 C>G adiponutrin/patatin-like phospholipase domain-containing 3 (PNPLA3) polymorphism, which encodes the I148M protein variant in the catalytic domain, has been associated with severe steatosis, NASH, and liver fibrosis in adults.